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high-quality block-sorting file compressor - utilities

bzip2 is a freely available, patent free, high-quality data compressor.
It typically compresses files to within 10% to 15% of the best available
techniques, whilst being around twice as fast at compression and six
times faster at decompression.

bzip2 compresses files using the Burrows-Wheeler block-sorting text
compression algorithm, and Huffman coding. Compression is generally
considerably better than that achieved by more conventional
LZ77/LZ78-based compressors, and approaches the performance of the PPM
family of statistical compressors.

The archive file format of bzip2 (.bz2) is incompatible with that of its
predecessor, bzip (.bz).